(Aad Granth Sahib - Page 1105)
Though Guru Gobind Singh Ji succeeded in destroying islam government, He intentionally left out Malerkotla and allowed the city to be occupied by the majority of muslims.
The reason being that when The 2 Sahibzadas(sons), Jorawar Singh Ji and Fateh Singh Ji, of Satguruji were martyred, Nahar Khan, a pathan of Malerkotla pleaded for Them to be released. Satguruji therefore leftout the muslims' roots in Malerkotla. However, He also Ordered that His Sikhs would sacrifice their lives to get rid the Turk's reign as mentioned in The Sakhi Wad Teerath: